JPS6220529B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows the lens frame to be moved up and down and at the same time change the inclination angle with a simple operation while the lens is in the worn state, so that the lens can be worn correctly no matter which lens part is used. The present invention relates to a multifocal eyeglass frame which is adapted to be in a state of

The right glasses are said to meet the following four conditions.

The optical centers of the left and right lenses must align with the pupils of the left and right eyes, respectively, in the horizontal direction.

The optical centers of the left and right lenses are aligned with the pupils of the left and right eyes in the vertical direction as well.

The angle of inclination of the lens must be the optimum angle required for each purpose of use (approximately 10
For near vision, the tilt angle is between 15 degrees and 20 degrees.
The distance between the back surface of the lens and the corneal apex is approximately 12
To become mm.

It should be noted that ready-made reading glasses that do not meet the above four conditions are considered medically unacceptable, and therefore, although they are inexpensive, they are not widely used.

By the way, multifocal eyeglasses fitted with multifocal lenses such as bifocal lenses have been widely used as they are more convenient than ordinary reading glasses. However, with these conventional lenses, the lens frame cannot be moved up and down, so depending on the lens part used, it is possible to meet the above conditions, but when using other lens parts, The glasses failed to meet the other requirements.

In order to partially eliminate these shortcomings,
For example, a multifocal eyeglass frame as shown in Japanese Utility Model Application Publication No. 56-93715 was devised. This device allows you to move the lens frame up and down by rotating and moving the nose piece up and down while wearing the glasses, and for distance vision, align the optical center of the distance lens part with the pupil of the eye. In the case of near vision, the optical center of the near point lens section is brought close to the height of the pupil.

However, this device has drawbacks as shown in FIG. In other words, it has not been commercialized because the correct angle of the glasses cannot be created, the correct distance between the corneal vertices cannot be created, and the glasses tend to slip down (the reasons will be explained later). Now, with this product, when the nose piece is raised and the lens frame is lowered and supported in order to see far away under normal conditions while using the distance lens part, the line of sight and the lens are almost the same. They are in a perpendicular state. However, when the nose piece is lowered and the lens frame is supported in a lifted state in order to see near the user while using the near-point lens part, the lens frame is oriented slightly upward. Moreover, since the line of sight is directed downward to look at the hand, the line of sight and the lens become oblique. Furthermore, the lens moves away from the eye. Therefore, even if the above conditions can be met,
This condition cannot be met. This causes eye fatigue.

On the other hand, an eyeglass frame has also been invented in which the inclination angle of the lenses is adjusted to be appropriate for both the line of sight for distance vision and the line of sight for near vision (Japanese Patent Laid-Open No. 56-4118). Publication No.). In this case, the front ends of supports are attached to the outside of each pair of left and right lens frames, and frame legs are attached to each of the supports so that they can rotate vertically toward the rear. It is something.

This product simply satisfies the above conditions by allowing the lens frame to be used with the lens frame upright for distance vision, and slightly tilted forward for near vision. It's just something you do. It does not use a multifocal lens, nor does it allow you to move the lens frame up and down. Since no means is provided to restrict the rotation range of the frame legs, it is necessary to pay close attention to the proper inclination angle each time the inclination angle of the lens frame is changed. It's hard to use your nerves every time. Even if they are careful, it is difficult to imagine that ordinary users who do not necessarily have sufficient knowledge of how to use glasses will always be able to achieve the correct tilt angle.

Now, of the four conditions mentioned above regarding the correct glasses, condition 1 can be met if the technician at the optician shop selects the lenses, cut, and glasses that are optimal for the wearer. be able to.

Although this invention uses a multifocal lens,
It is an object of the present invention to provide a multifocal eyeglass frame that can satisfy the remaining three conditions no matter which lens part is used. That is, this invention enables the lens frame to be moved up and down and the frame legs to be bent by simple operations while the lens frame is being worn, and the angle of the lens frame can be changed at the same time. To provide a multifocal eyeglass frame which can be used in as optically ideal a state as possible no matter which lens part is used.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows the application of this invention to bifocal glasses.
It is a perspective view showing an example. A indicates the main body of the glasses, and the main body A includes the left and right lens frames 1, 1.
and a central connecting piece 2 that connects the left and right lens frames 1, 1 slightly above the center. Lenses 3, 3 are fitted into lens frames 1, 1, respectively.
The lenses 3, 3 are bifocal lenses in which a near-point lens section 5, 5 is integrally formed slightly below the distance lens section 4, 4. The parts shown above are
This is the structure of conventionally known bifocal glasses.

The nose pieces 6, 6 are mounted inside the lens frames 1, 1 so as to face each other so as to be able to rotate in the vertical direction, and the mounting mechanism will be explained with reference to FIG.

A support piece 7 is fixedly attached to the inside of the lens frame 1, but a semicircular cut is made in the support piece 7 from the tip side, and a semicircular cut with a smaller diameter than the cut is made at the tip of the cut. Since the cuts are made in opposite directions, two steps 8 and 9 are formed between these two cuts. Further, the support piece 7 is provided with a horizontal hole 11 for passing the screw 10 therethrough. The screw 10 functions as a rotation axis.

A separate rotating piece 12 is prepared. The rotating piece 12 is
It consists of a rotating plate 13 in the shape of a circular plate with a sector-shaped plate integrally attached to the outer periphery, and a dogleg-shaped leg rod 14 attached to the rotating plate 13.
A stepped portion 15 and a stepped portion 16 are formed on the rotary plate 13, and a hole 17 through which a screw 10 is passed is formed in the center. A ring 18 is attached to the tip of the leg rod 14.

The nose piece 6 is separate, and a cylindrical body 19 is attached to the back side of the nose piece 6. The cylindrical body 19 is sized to fit inside the ring 18 of the leg bar 14, and has a female thread cut inside. It's on.

To assemble the above, first fit the cylindrical body 19 of the nose piece 6 into the ring 18 of the leg bar 14, and then screw the screw 20 into the cylindrical body 19 from the other side. It is swingably mounted on the Next, the rotating plate 13 of the rotating piece 12 is fitted into the notch of the supporting piece 7, and after aligning the hole 11 of the supporting piece 7 and the hole 17 of the rotating plate 13, the screw 10 is inserted and screwed in to support the When the rotating piece 12 is rotatably attached to the piece 7, the state shown in FIG. 3 is obtained.

When the nose piece 6 is rotated upward, the rotation plate 1
When the stepped portion 15 of No. 3 stops against the stepped portion 8 of the support piece 7 and the nose piece piece 6 is rotated downward, the rotating plate 1
The stepped portion 16 of No. 3 comes into contact with the stepped portion 9 of the support piece 7 and stops there.

Incidentally, even if the rotating pieces 12, 12 are rotated upward or downward, the distance between the opposing nose pad pieces 6, 6 is kept substantially constant.

Frame legs 21 are provided on each outer side of the lens frames 1, 1, respectively.
21 is installed. These frame legs 21, 21 are designed to be able to be folded inward and rotated downwards like the conventional ones, but a mechanism that allows them to be rotated inwardly and downwardly has been added. This will be explained with reference to FIGS. 4, 5, and 6. FIG. 4 is an exploded perspective view of a portion of the rotation mechanism.

The front end of the support 22 is fixedly attached to the outside of the lens frame 1, and the rear end of the support 22 is shaped like an arc and has a hole 23 in the vicinity of the end. A U-shaped receiving piece 25 having two holes 24, 24 is attached to the inner surface of the support body 22 by brazing. At this time, the hole 23 of the support body 22 and the holes 24 of the receiving piece 25 are aligned.

A separate connecting piece 26 is prepared, and the front end edge of the connecting piece 26 is formed into a U-shape to form an upper abutting surface 27 and a lower abutting surface 28. A hole 29 is bored close to the front end edge, and two ring-shaped bodies 30 are formed on the rear end side with a slight interval in the vertical direction.
It forms 30. The inner surface of the lower ring-shaped body 30 is internally threaded.

Insert the connecting piece 26 into the receiving piece 25 and insert it into the hole 2 of the receiving piece 25.
4, 24 and the hole 29 of the connecting piece 26, insert the receiving screw 31 with a female thread on the inner surface into the receiving piece 2.
5, fit the male screw 32 from the hole 23 side of the support body 22, screw it into the receiving screw 31, and tighten. The receiving screw 31 and the male screw 32 function as a rotation shaft.

A separate rotating piece 33 is prepared, and a ring-shaped body 34 is formed on one end side of the rotating piece 33. The rotating piece 33 is attached near one end of the frame leg 21 by brazing. Ring-shaped body 3 of rotating piece 33
4 between both ring-shaped bodies 30, 30 of the connecting piece 26, screw the screw 35 through the upper ring-shaped body 30 and the ring-shaped body 34 of the rotating piece 33 into the lower ring-shaped body 30 and tighten. Then, the assembly is completed and the state shown in FIG. 5 is reached. Note that the front edge of the frame leg 21 is recessed in an arc shape so that it follows the arc-shaped rear edge of the support body 22, but after assembly, the rear edge of the support body 22 The edge and the front edge of the frame leg 21 fit together in a tight fit.

As is clear from Fig. 5, the frame leg 2
1 is a screw 35 tightened between the ring-shaped bodies 30, 30 of the connecting piece 26 and the ring-shaped body 34 of the rotating piece 33;
It can be rotated using the fulcrum as a fulcrum and folded inward. When the frame legs 21 are rotated outward,
The front end edge of the frame leg 21 comes into contact with the rear end edge of the support body 22 and stops there.

Further, the frame leg 21 can also rotate in the vertical direction using a receiving screw 31 and a male screw 32 screwed between the receiving piece 25 and the connecting piece 26 as a fulcrum.
As is clear from FIG. 6, the frame legs 21
When the frame leg 21 is rotated upward, the upper abutting surface 27 of the connecting piece 26 comes into contact with the receiving piece 25, and when the frame leg 21 is rotated downward, the lower abutting surface 27 of the connecting piece 26 stops.
8 comes into contact with the receiving piece 25 and stops.

The above-mentioned device is used as shown in FIG. First, if you want to see far away under normal conditions while using the far distance lens parts 4, 4, as shown in Fig. 7A, rotate the frame legs 21, 21 upward to straighten the eyelids, and then The lens parts 4, 4 and the frame legs 21, 21 are placed in a state that they are substantially perpendicular to each other, and the nose pieces 6, 6 are rotated upward to be placed in the upper position when worn. FIG. 7 is a somewhat schematic partial cross-sectional side view showing the state of use, and the island-shaped part shown with hatching near the root of the nose is the contact surface on which the nose pieces 6, 6 come into contact. However, in the state shown in FIG. 7A, the main body A is supported in a lowered state because the nose pieces 6, 6 are raised and abut against this contact surface.

At this time, the rotating plates 13, 1 of the rotating pieces 12, 12
The stepped portions 15, 15 of 3 are the stepped portions 8, 8 of the supporting pieces 7, 7.
The rotating pieces 12, 12 and the nose piece 6,
6 is prevented from rotating upward. Further, the upper contact surfaces 27, 27 of the connecting pieces 26, 26 are connected to the receiving pieces 25,
25 and prevents further upward rotation of the frame legs 21, 21. As is clear from the above, the nose pieces 6, 6 and the frame legs 21, 2
When rotating 1 upward, it is sufficient to rotate it to the point where it can be rotated upward. Therefore, the operation of rotating them upward can be performed casually without using any nerves.

In the wearing state shown in FIG. 7A, the main body A is supported in a lowered state, and the distance lens parts 4, 4 are located approximately in the center of the line of sight, and the distance lens parts 4, 4 are located approximately in the center of the line of sight, and The lens portions 4, 4 are substantially orthogonal to each other.

In this wearing state, the near point lens portion 5,
5 is located at a lower position where it does not get in the way, eliminating the negative effects of worrying about the boundary between the far-field lens sections 4, 4 and the near-point lens sections 5, 5, or making the feet blurry, and providing comfortable viewing. You can feel the feeling of wearing it.

Next, when reading or looking at something at hand, hold the main body A and apply force to tilt the main body A forward while pulling the lower side of the main body A backward. The main body A is bent around the receiving screws 31, 31 and the male screws 32, 32 with respect to the frame legs 21, 21, so that the main body A is slightly tilted forward. At this time, the lower contact surfaces 28, 28 of the connecting pieces 26, 26 are in contact with the receiving pieces 25, 25. At the same time, lift the main body A and insert the nose piece 6.
When the upper end of 6 is pressed against the edge of the eyebrows, the nose pieces 6, 6 are pushed downward and the screws 10, 1
The rotating pieces 12, 12 rotate downward about 0, and the stepped portions 16, 16 of the rotating pieces 12, 12 abut against the stepped portions 9, 9 of the supporting pieces 7, 7. At this time, the nose pieces 6, 6 are also rotated downward via the leg bars 14, 14 and are fixed in that state. As is clear from the above, when the nose pieces 6, 6 and the frame legs 21, 21 are to be rotated downward, it is only necessary to rotate them to the point where they can be rotated downward. Therefore, the operation of rotating them downward can be performed casually without using any nerves.

When worn in this state, the main body A is supported in a slightly upwardly lifted state and slightly tilted forward, resulting in the state shown in FIG. 7B. At this time, the main body A is lifted by an amount corresponding to the amount by which the nose pieces 6, 6 are lowered. That is, main body A
In addition to the sides and frame legs 21, 21 being bent, the nose pieces 6, 6 are lowered, so that the distance between the nose pieces 6, 6 and both ears is slightly shorter. Because of this, the nose pieces 6, 6 come into contact with the contact surfaces on both sides of the nose at a slightly higher position than in the state shown in FIG. 7A. The main body A is lifted by a height corresponding to the sum of the amount of descent of the nose pieces 6, 6 and the amount of rise of the contact surface.

The near-point lens portions 5, 5 are slightly raised and closer to the center of the visual field, and further closer to the eyes.
Moreover, when using the near-point lens parts 5, 5, we often look at things at hand, and when we look at things at hand, our line of sight is directed downward, so the main body A is tilted slightly forward. The angle is almost perpendicular to the line of sight. Since the near-point lens parts 5, 5 are close to the center of the visual field and are substantially orthogonal to the line of sight, the eyes will not get tired even when used for a long time. Moreover, since it is close to the eyes, the field of view of the near-point lens parts 5, 5 is widened.

Then, to return the distance lens sections 4, 4 to the state where they can be used again, push the lower side of the main body A forward to align the support body 22 and the frame legs 21, 21, and at the same time push down the main body A. Nose piece 6,
6 is pressed against both sides of the nose, the rotating pieces 12, 12 rotate upward around the screws 10, 10, and the nose pieces 6, 6 also rotate upward, and when worn in this state, the The state will be as shown in Figure 7 A.

Although the embodiments using bifocal lenses have been shown above, it goes without saying that the multifocal eyeglass frame according to the present invention can be used with progressive multifocal lenses and other multifocal lenses with three or more focal points. do not have.

Further, the present invention has the following excellent effects. First, the multifocal eyeglass frame according to the present invention is easy to operate. In other words, in the case of far vision, the frame legs 21, 21 are left in the worn state when worn.
and the nose pieces 6, 6 are rotated upward until they stop. Supports 22, 22 side and connecting piece 2
between the 6 and 26 sides and between the support pieces 7 and 7 sides and the rotating piece 1
It is only necessary that the rotation range restricting means provided between the 2 and 12 sides act to prevent upward rotation of the two. On the other hand, for nearsightedness,
Similarly, while still being worn, the frame legs 21, 21 and nose pieces 6, 6 are rotated downward until they stop. It is only necessary that the rotation range regulating means is activated to prevent their downward rotation.

In other words, the operation is really simple because all that is required is to rotate the frame legs 21, 21 and the nose pieces 6, 6 up and down until they stop.

The multifocal eyeglass frame according to the present invention can satisfy the four conditions for proper eyeglasses even though it uses a multifocal lens. That is, the above conditions can be satisfied by the technology of the optician, but the remaining three conditions are satisfied as follows.

First, when viewing far away, the frame legs 21, 21 and the nose pieces 6, 6 are rotated upward and worn. At this time, the lens is at an appropriate height, an appropriate inclination angle, and an appropriate distance from the corneal vertex. Next, in the case of near vision, frame legs 21, 2
1 and the nose pieces 6, 6 are rotated downward to be worn.
At this time, the lens is slightly raised to an appropriate height, tilted slightly forward to an appropriate inclination angle, and furthermore, the distance from the corneal vertex is appropriate.

In short, the device according to the present invention allows each ideal state to be easily created for both far vision and near vision through simple operations.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention, FIG. 2 is a partially cutaway exploded perspective view of the main part of the embodiment, FIG. 3 is a perspective view showing the assembled state of the structure shown in FIG. 4 is an exploded perspective view of another main part of the embodiment, FIG. 5 is a perspective view showing the assembled state of the embodiment shown in FIG. 4, and FIG. 6 is a partially cutaway front view of the embodiment shown in FIG.
FIG. 7 is an explanatory view for explaining the operation of this embodiment, and FIG. 8 is a somewhat schematic side view showing the state of use of the conventional example. DESCRIPTION OF SYMBOLS 1... Lens frame, 2... Central connecting piece, 6... Nose piece, 7... Support piece, 12... Rotating piece, 14...
Leg stick, 21...frame leg.

Claims (1)

[Claims] 1 Left and right 1 where multifocal lenses are fitted respectively
The inner sides of the pair of lens frames 1, 1 are connected by a central connecting piece 2, and the front end sides of supports 22, 22 are attached to the outer sides of both lens frames 1, 1, respectively. The connecting pieces 26, 26 are each provided with a rotation mechanism that can rotate the connecting pieces 26 in the vertical direction, and the connecting pieces 2
6, 26 are respectively attached, frame legs 21, 21 are connected to the rear of the connecting pieces 26, 26, respectively, facing backward, and the supporting bodies 22, 22 side and the connecting piece 2
A rotation range regulating means is provided between the frame legs 21 and 26 sides so that the frame legs 21 and 21 can rotate between a substantially horizontal position and a slightly downwardly rotated position. Support pieces 7, 7 are attached to the inside of each of the frames 1, 1, and each of these support pieces 7, 7 can be rotated in the vertical direction about the rotation axis by a rotation axis passed through each of the support pieces 7, 7 in the horizontal direction. Attach the rotating pieces 12, 12 as shown, and also attach the supporting pieces 7,
There is a rotating piece 1 between the 7 side and the rotating pieces 12, 12 side.
2, 12 is provided with a rotation range regulating means for regulating the range in which the rotation pieces 12, 1 can be rotated in the vertical direction.
A multifocal eyeglass frame with nose pieces 6, 6 attached to the tips of 2, respectively.